Most land nowadays is depleted of minerals from conventional farming.  Minerals are critical for the health of the plants and, subsequently, the animals and people.  Restoration of this land is a must, especially in grass-fed, no grain operations where the cows do not receive a commercial "balanced" complete feed with minerals added.  Interestingly, one of the best ways to repair the land is with cows.

I feed individual free-choice minerals.  The first cows I bought were from a grass-fed, grain-free operation.  When I started feeding these minerals, the cows nearly mauled me to get at them, they needed them so badly.